Air airport is operating a CAT II/III ILS, What is the power source being used?

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Multiple Choice

Air airport is operating a CAT II/III ILS, What is the power source being used?

Explanation:
CAT II/III ILS requires power that stays on without interruption, with a fast, automatic failover mechanism. In this setup, the airport emergency power system is used as the primary source to keep the ILS functioning even during a power outage. A commercial power source is kept ready as a rapid backup and can be connected within about one second if needed. This combination provides the high reliability and instant transfer necessary for CAT II/III operations, ensuring the approach aids remain powered during outages. Other arrangements either rely on normal commercial power without guaranteed immediate fallback, or place the emergency power as a backup, which doesn’t meet the need for an ultra-fast and continuous power supply for these critical systems.

CAT II/III ILS requires power that stays on without interruption, with a fast, automatic failover mechanism. In this setup, the airport emergency power system is used as the primary source to keep the ILS functioning even during a power outage. A commercial power source is kept ready as a rapid backup and can be connected within about one second if needed. This combination provides the high reliability and instant transfer necessary for CAT II/III operations, ensuring the approach aids remain powered during outages. Other arrangements either rely on normal commercial power without guaranteed immediate fallback, or place the emergency power as a backup, which doesn’t meet the need for an ultra-fast and continuous power supply for these critical systems.

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